*{margin: 0;padding: 0;}
html,body{
    font-family: -apple-system,SF UI Text,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,WenQuanYi Micro Hei,sans-serif;
}
a{
    text-decoration: none;
    color:rgb(97, 97, 97);
}
li{
    list-style:none;
}
.top-logo{
    background:#18BEBE url(../images/logo.png) no-repeat center;
    height:70px ;
}
.top-nav{
    background: #EFEFEF;
    height:40px;
    line-height: 40px;
}
.top-nav-content{
    position: relative;
    margin: 0 auto;
    width:1000px;
    height: 40px;
}
.top-nav-left{
    position: absolute;
    left:0;
    font-size:12px;
}
.top-nav-left i{
    color:rgb(24, 190, 190);
    font-size: 20px;
}
.top-nav-left span{
    display: inline-block;
    transform: translateY(-2.5px);
}

.top-nav-center{
    overflow: hidden;
    position: absolute;
    left:50%;
    transform: translateX(-50%);
}
.top-nav-center li{
    font-size:17px;
    float:left;
}

.top-nav-center li:nth-child(2){
    margin-left: 60px;
}
.top-nav-center li:nth-child(3){
    margin:0 60px;
}
.top-nav-right{
    position: absolute;
    right:0;
    font-size: 13px;
}
.top-nav-right i{
    font-size: 18px
}